Chylothorax and chylopericardial tamponade following Blalock-Taussig anastomosis.

A case of chylothorax following a right-sided Blalock-Taussig shunt is presented. Chylopericardial tamponade eventually developed, because the mediastinal leakage of chyle was sealed off from the pleural cavity and diverted into the pericardium. Chylopericardium is a rare cause of an enlarged cardiac silhouette on a postoperative chest roentgenogram, but the importance of differentiating it from congestive heart failure is illustrated. When chylopericardial tamponade occurs, treatment consists of (1) aspiration for immediate relief and, if there is recurrence, (2) surgical evacuation of the pericardium with tube drainage or pericardiectomy and (3) ligation of the source of chylous drainage.